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Mathematics 17 Online
OpenStudy (anonymous):

On Tuesday, she ran 1 1/8 miles and on Thursday she ran 2 miles. How many more miles does she need to run this week to reach her goal?

OpenStudy (anonymous):

what is her goal?

OpenStudy (anonymous):

her goal is 5 miles

OpenStudy (anonymous):

what is 5-(9/8+16/8)?

OpenStudy (anonymous):

what

OpenStudy (anonymous):

If she ran 1 1/8 miles(equals 9/8) and then 2 miles(equlas 16/8), add them together and subtract them from the distance she need to run.

OpenStudy (anonymous):

thx

OpenStudy (anonymous):

you're welcome.

OpenStudy (anonymous):

what would the answer be (i suck at math)

OpenStudy (anonymous):

how old are you?

OpenStudy (anonymous):

why

OpenStudy (anonymous):

i want to see if you are old enough to do simple addition and subtraction.

OpenStudy (anonymous):

to be safe, what grade are you in?

OpenStudy (anonymous):

i am and i did the adding it's just your talking about subtracting a fraction from a whole number and i really really really really at math

OpenStudy (anonymous):

i only in 6 th but i'm in home schooling so my teachers don't help me

OpenStudy (anonymous):

what numbers do you have so far?

OpenStudy (anonymous):

i have 25/8 and it might be wrong but like i said i suck at math

OpenStudy (anonymous):

that is right so far. now, in order to add fractions, the denominators, the number at the bottom, must be equal. Did you know that?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

good. so you need to find a number that, if you divide it by 8, you get 5. what number is this?

OpenStudy (anonymous):

?

OpenStudy (anonymous):

think about it like this. you are addding 25/8 +5, but you can't do it yet because the denominators are not the same. so what can you do to 5 to let it have a denominator of 8?

OpenStudy (anonymous):

you can divide it by 40

OpenStudy (anonymous):

close. do you mean like this 5/40?

OpenStudy (anonymous):

actually i was thinking the other way around 40/5

OpenStudy (anonymous):

right!:) good job. ok. i made a mistake earlier when I said you are adding 25/8 +5. really, you are doing this: 5-25/8. Can you take it from here?

OpenStudy (anonymous):

yeah thx so much

OpenStudy (anonymous):

ok. I'll tell you if your answer is right once you tell me what you get.

OpenStudy (anonymous):

do you have an answer yet?

OpenStudy (anonymous):

yeah i tried writing it out and it got me i don't know how but it was 1.875

OpenStudy (anonymous):

yes. that is exactly correct. good job!

OpenStudy (anonymous):

oh um wow i thought i was wrong thx

OpenStudy (anonymous):

glad I could be of assistance.

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